Identify, from each list below, the compound or compounds...

Identify, from each list below, the compound or compounds that will dissolve in water to give a solution that strongly conducts electricity. (a) $\mathrm{CuCO}_{3}, \mathrm{Cu}(\mathrm{OH})_{2}, \mathrm{CuCl}_{2}, \mathrm{CuO}$ (b) $\mathrm{HCl}, \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}, \mathrm{H}_{3} \mathrm{PO}_{4}, \mathrm{H}_{2} \mathrm{SO}_{4}$

Identify, from each list below, the compound or compounds that will dissolve in water to give a solution that strongly conducts electricity.
(a) $\mathrm{CuCO}_{3}, \mathrm{Cu}(\mathrm{OH})_{2}, \mathrm{CuCl}_{2}, \mathrm{CuO}$
(b) $\mathrm{HCl}, \mathrm{H}_{2} \mathrm{C}_{2} \mathrm{O}_{4}, \mathrm{H}_{3} \mathrm{PO}_{4}, \mathrm{H}_{2} \mathrm{SO}_{4}$

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Key Concepts

Solubility and Ionic Dissociation

This concept refers to the process in which a substance dissolves in a solvent, typically water, and breaks apart into its constituent ions. The degree to which a compound dissociates into ions directly affects the electrical conductivity of the solution, with complete dissociation resulting in a higher concentration of charge carriers.

Electrolytes

Electrolytes are compounds that when dissolved in water produce charged particles (ions) that can move freely in solution, thereby facilitating the conduction of electricity. The conductivity level of a solution depends on both the concentration and mobility of these ions.

Strong Electrolytes versus Weak Electrolytes

Strong electrolytes are compounds that fully dissociate into ions when dissolved in water, leading to high conductivity. In contrast, weak electrolytes only partially ionize, resulting in fewer free ions and consequently lower electrical conductivity in the solution.

Acid Strength and Ionization

In aqueous solutions, acids can be classified as strong or weak based on the extent of their ionization. Strong acids completely dissociate into their constituent ions, enhancing the solution’s electrical conductivity, whereas weak acids only partially ionize, which limits the number of free ions available to conduct electricity.

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